通用FUNCTION，如果不能取真實IP，就會取代理IP

　　Private Function getIP()

　　Dim strIPAddr

　　If Request.ServerVariables("HTTP_X_FORWARDED_FOR") = "" OR InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), "unknown") > 0 Then

　　strIPAddr = Request.ServerVariables("REMOTE_ADDR")

　　ElseIf InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",") > 0 Then

　　strIPAddr = Mid(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), 1, InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",")-1)

　　ElseIf InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ";") > 0 Then

　　strIPAddr = Mid(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), 1, InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ";")-1)

　　Else

　　strIPAddr = Request.ServerVaria

　　End If

　　getIP = Trim(Mid(strIPAddr, 1, 30))

　　End Function